Password Generator
Cryptographically secure passwords, generated in your browser.
Why use it
Strong passwords in one click
Works everywhere
Valid passwords for any service: banks, email, social networks, corporate applications.
100% private
Passwords are generated only in your browser. Never sent to any server or stored anywhere.
Real cryptography
Uses crypto.getRandomValues(), the industry standard for cryptographic randomness in the browser.
Instant
Generate a new password in milliseconds. No waiting, no accounts, no limits.
How it works
Three steps, no hassle
Choose length and character types
Select how many characters you want and which types to include: uppercase, lowercase, numbers, and symbols.
Generate your password
Click 'Generate'. The password is created with crypto.getRandomValues(), the same API used by banking applications.
Copy and use it
Copy the password with one click and save it in your password manager. Never write it on paper.
FAQ
Got questions?
Yes. We use crypto.getRandomValues(), the browser's Cryptographically Secure Pseudo-Random Number Generator (CSPRNG). Unlike Math.random(), which is predictable, crypto.getRandomValues() draws from operating system entropy sources and is impossible to predict or reproduce.
A strong password combines length and variety. A 16-character password with uppercase, lowercase, numbers, and symbols has over 10²⁹ possible combinations. Length matters more than complexity: 'correct-horse-battery-staple' (28 characters) is stronger than 'P@ssw0rd' (8 characters).
When a website is hacked, attackers obtain user passwords. If you reuse the same password, they can try it on every other service you use — this is called credential stuffing. With unique passwords per site, a single breach cannot compromise your other accounts.
For important accounts (bank, email, work), use at least 16 characters. For less critical sites, 12 is acceptable. NIST guidelines recommend prioritizing length over complexity and favor long passphrases.
Yes. The password is generated entirely in your browser using JavaScript and is never sent to any server. You can verify this by disconnecting your internet before generating — the tool still works because it makes no network requests.
Password generator: real cryptography vs. fake randomness
Most simple password generators use Math.random(), a function that produces pseudo-random numbers based on a predictable seed. This makes them inadequate for real security. A secure password generator must use a Cryptographically Secure Pseudo-Random Number Generator (CSPRNG). In modern browsers, this is achieved with the Web Cryptography API through crypto.getRandomValues().
A password's search space determines how long it would take an attacker to guess it by brute force. An 8-character letters-only password has 26⁸ = 208 billion combinations, which a modern computer can test in seconds. A 16-character password with 94 possible symbols has 94¹⁶ ≈ 3.7 × 10³¹ combinations — infeasible even for specialized hardware over millions of years.
Convertir.ai generates passwords exclusively in your browser. The password is never transmitted to any server, not logged, and not stored in any database. For maximum security, save generated passwords in a password manager such as Bitwarden (open source and free), 1Password, or KeePass, and enable two-factor authentication on your most critical accounts.